codex-pet-maker

Build a Codex-app-compatible animated pet (1536×1872 atlas, 8×9 grid, pet.json + spritesheet.webp) from a name, a one-line description, and an optional reference image. Replaces hatch-pet's chroma-key matte with rembg + alpha matting (no green halo) and removes operational ceremony. Use this skill when the user asks to make, build, generate, or design a Codex desktop pet.